Internal-combustion engine.



R. LUCAS.

INTERNAL COMBUSTION ENGINE.

APPLIGATION FILED JAN.28, 1909.

952,706. Patented Mar.22, 1910.

%Zmaw RALPH LUCAS, OF BLACKHEATH, ENGLAND, ASSIGNOR TO VALVELESSLIMITED, OF

LONDON, ENGLAND.

INTERNAL-COMBUSTION ENGINE;

Specification of Letters Patent.

Patented Mar. 22, 1910.

Application filed January 28, 1909. Serial No. 474,792.

To all whom it may concern:

Be it known that I, RALPH LUCAS, engineer, a subject of the King ofGreat Britain, residing at 191 Westcombe Hill, Blackheath, in the countyof Kent, England, have invented new and useful Improvements inInternal-Combustion Engines, of which the following is a specification.

This invention relates to improvements in the details of engines of thewell known type having two cylinders placed side by side and openinginto combustion and crank chambers common to both, the pistons in thecylinders operatin cranks on two parallel crank shafts which are gearedtogether.

Figure 1 is a section of an engine embodying these improvements. Figs. 2and 3 are local sections. Fig. 4 shows a detail.

1, 1 are the two cylinders, 2 is the combustion chamber, and 3 the crankchamber;

4 are the pistons connected by rods 5 to crank pins 6 fixed to disks 7on the crank shafts 8, the latter being geared together by toothedwheels 9.

10 and 17 are counterbalance weights fixed to the disks 7.

' 11 is the pipe supplying liquid fuelthrough the needle valve 12 and 13is the air supply valve mounted on the needle 12- and working agpinstthe spring 14.

18 is the spar ing plug.

30 are lubricating tubes.

31 are oil traps and 32 are draw ofi cocks.

The action of the engine is as follows: As the pistons rise air issucked into the crank chamber 3 and fuel is sucked through the valve 12.When the pistons descend on the charge being fired the air in the crankchamber is compressed until the port 15 is uncovered and then thecompressed air rushes past the valve thereby becoming impregnated withinflammable vapor and enters the cylinders 1 and combustion chamber 2sweepin out the products of combustion through t e exhaust port 16. Thepis tons then rise again compressin the charge and so on. All the aboveis wel known and requires no further explanation.

Inorder to insurea good blast of air past the fuel valve 12, even whenthe air supply is throttled, the passage leading to the valve 12 isdivided into two or more passages (three are shown at Fig. 3) and thethrottle valve 19 has corresponding ports of which the middle one isthelarger so that when the valve 19 is partially closed all or nearlyall of the air passes through the middle port directly across the valve12.

In order to better proportion the quantities of liquid fuel and air theneedle valve 12 in place of being made conical as is usual is made Wedgeshaped with cylindrical edges, as shown at Fig. 4.

In order to render the engine more silentthe air is admitted to thevalve 13 from a chamber 20 formed in the casing of the engine, the airentering this chamber through a hole 21.

The exhaust port is indicated at 16. There is only one exhaust port forthe two cylinders.

What I claim in engines of the type referred to is- 1. The combinationof two cylinders placed side by side, a combustion chamber open to oneend of both cylinders, a crank chamber open to the other end of bothcylinders, means for supplying air to the crank chamber, a'plurality ofpassages connecting the crank and combustion chambers, means forsupplying fuel to one of the passages, and a valve adapted to close theother passages while the latter passage is left open.

2. The combination of two cylinders placed side by side, acombnstionchamber open to one end of both cylinders a crank chamber open to theother end of both cylinders, a silencing chamber provided with anopening for the admission of air, a nonreturn valve between thesilencing and crank chambers, a passage connecting the crank andcombustion chambers, and a pipe supplyingfuel to the passage.

3. The combination of two cylinders placed side by side, a combustionchamber open to one end of both cylinders, a crank chamber open to theother end of both cylinders, means for supplying air to the crankchamber a plurality of passages connecting the crank and combustionchambers,,a pipe sup lying fuel'to one of the assages, a w ge shapedneedle with cylin rical edges closing the end of the pipe, and a valveada ted to close the other passages while the atter passage is leftopen.

4. The combination of two cylinders placed side by side, a combustionchamber. open to one end of both cylinders, a crank chamber open to theother end of both cylinders, a silencing chamber provided with anopening for the admission of air, a nonreturn valve between thesilencing and crank chambers, a plurality of passages connecting thecrank and combustion chambers, means for supplying fuel to one of thepassages, and a valve adapted to close the other passages while thelatter passage is left open.

5. The combination of two cylinders placed side by side, a combustionchamber open to one end of both cylinders, a crank chamber open to theother end of both cylinders, a silencing chamber provided with anopening for admission of air, a non-return valve between the silencingand crank chambers, a passage connecting the crank and combustionchambers, a pipe supplying fuel to the passage, and a wedge shapedneedle with cylindrical. edges closing the end of the pipe.

(3. The combination of two cylinders placed side by side, a combustionchamber open to one end of both cylinders, a crank chamber open to theother end of both cylinders, means for supplying air to the crankchamber, a plurality of passages connecting the crankand combustionchambers, a pipe supplying fuel to one of the passages, a Wedge shapedneedle with cylindrical edges fixed to the non-return valve and closingthe end of the pipe, and a valve adapted to close the other passageswhile the latter passage is left open.

7 The combination of two cylinders placed side by side, a combustionchamber open to one end of both cylinders, a crank chamber open to theother end of both cylinders, a silencing chamber provided with anopening for the admission of air, a nonreturn valve between thesilencing and crank chambers, a passage connecting the crank andcombustion chambers, a pipe supplying fuel to the passage, and a wedgeshaped needle with cylindrical edges fixed to the non-return valve andclosing the end of the pipe.

RALPH LUCAS.

Witnesses i H. D. Jameson, F. L. RAND.

